/*

  * Copyright 2006-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  * http://www.opensource.org/licenses/ecl2.php

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.rice.kcb.web.spring;

 import org.apache.log4j.Logger;

 import org.kuali.rice.kcb.bo.RecipientDelivererConfig;

 import org.kuali.rice.kcb.deliverer.MessageDeliverer;

 import org.kuali.rice.kcb.exception.ErrorList;

 import org.kuali.rice.kcb.service.KENIntegrationService;

 import org.kuali.rice.kcb.service.MessageDelivererRegistryService;

 import org.kuali.rice.kcb.service.RecipientPreferenceService;

 import org.springframework.beans.factory.annotation.Required;

 import org.springframework.web.servlet.ModelAndView;

 import org.springframework.web.servlet.mvc.multiaction.MultiActionController;

 import javax.servlet.ServletException;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import java.io.IOException;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.HashMap;

 import java.util.Map;

 /**

  * This class is the controller that handles management of various user preferences interfaces (deliver types, user subscriptions, etc).

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class UserPreferencesController extends MultiActionController {

     /** Logger for this class and subclasses */

     private static final Logger LOG = Logger.getLogger(UserPreferencesController.class);

     private static final String VIEW = "DelivererPreferences";

     private static final String KEW_CHANNEL = "KEW"; 

     protected RecipientPreferenceService recipientPreferenceService;

     protected MessageDelivererRegistryService messageDelivererRegistryService;

     protected KENIntegrationService kenIntegrationService;

     /**

      * Set the RecipientPreferenceService

      * @param recipientPreferenceService

      */

     @Required

     public void setRecipientPreferenceService(RecipientPreferenceService userPreferenceService) {

         this.recipientPreferenceService = userPreferenceService;

     }

     /**

      * Set the MessageDelivererRegistryService

      * @param messageDelivererRegistryService

      */

     @Required

     public void setMessageDelivererRegistryService(MessageDelivererRegistryService messageDelivererRegistryService) {

         this.messageDelivererRegistryService = messageDelivererRegistryService;

     }

     /**

      * Sets the KENIntegrationService

      * @param kis the KENIntegrationService

      */

     @Required

     public void setKenIntegrationService(KENIntegrationService kis) {

         this.kenIntegrationService = kis;

     }

     /**

      * @return all channels for Rice, including the builtin KEW action list "channel"

      */

     protected Collection<String> getAllChannels() {

         // TODO: does not traverse bus yet

         Collection<String> allChannels = new ArrayList<String>();

         //allChannels.add(KEW_CHANNEL);

         allChannels.addAll(kenIntegrationService.getAllChannelNames());

         return allChannels;

     }

     /**

      * displayDelivererConfigurationForm - obtain information necessary

      * for displaying all possible Deliverer types and forward to the form

      * @param request

      * @param response

      * @return

      * @throws ServletException

      * @throws IOException

      */

     public ModelAndView displayDelivererConfigurationForm(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         String userid = request.getRemoteUser();

         LOG.debug("remoteUser: "+userid); 

         // Get DeliveryType classes

         Collection<MessageDeliverer> deliveryTypes = this.messageDelivererRegistryService.getAllDeliverers();

         // get all channels       

         Collection<String> channels = getAllChannels();

         //     get all user preferences in a HashMap

         HashMap<String, String> preferences  = this.recipientPreferenceService.getRecipientPreferences(userid);

         // get existing configured deliverers

         Collection<RecipientDelivererConfig> currentDeliverers = this.recipientPreferenceService.getDeliverersForRecipient(userid);

         // create a Map as an easy way for the JSP to determine whether a deliver is enabled for channels

         Map<String, Boolean> currentDeliverersMap = new HashMap<String, Boolean>();

         for (RecipientDelivererConfig udc: currentDeliverers) {

             String channelName = udc.getChannel();

             currentDeliverersMap.put(udc.getDelivererName() + "." + channelName, Boolean.TRUE);

         }

         Map<String, Object> model = new HashMap<String, Object>();

         model.put("channels", channels);

         model.put("deliveryTypes", deliveryTypes);

         model.put("preferences", preferences);

         model.put("currentDeliverersMap", currentDeliverersMap);

         return new ModelAndView(VIEW, model);

     }

     /**

      * saveDelivererConfiguration - save deliverer configuration data

      * @param request

      * @param response

      * @return

      * @throws ServletException

      * @throws IOException

      */

     public ModelAndView saveDelivererConfiguration(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         String userid = request.getRemoteUser();

         LOG.debug("remoteUser: "+userid);

         boolean error = false;

         Map<String, Object> model = new HashMap<String, Object>();

         // create preferences map here so that we can pass them all back to the view

         HashMap<String, String> preferences  = new HashMap<String, String>();

         // Get DeliveryType classes.  loop through each deliverer type to 

         // to obtain preferenceKeys.  Check to see if a matching request

         // parameter was provided, then save a record for the userID, channelID, and 

         // preference setting

         Collection<MessageDeliverer> deliveryTypes = this.messageDelivererRegistryService.getAllDeliverers();

         // first remove all configured user delivers for this user

         this.recipientPreferenceService.removeRecipientDelivererConfigs(userid);        

         for (MessageDeliverer dt: deliveryTypes) {

             String deliveryTypeName = dt.getName();

             HashMap<String,String> prefMap = dt.getPreferenceKeys();

             LOG.debug("deliveryName: "+deliveryTypeName);

             HashMap<String, String> userprefs = new HashMap<String, String>();

             for (String prefKey:prefMap.keySet()) {

                 LOG.debug("   key: "+prefKey+", value: "+request.getParameter(deliveryTypeName+"."+prefKey));

                 userprefs.put(deliveryTypeName+"."+prefKey, request.getParameter(deliveryTypeName+"."+prefKey ));

                 preferences.put(deliveryTypeName+"."+prefKey, request.getParameter(deliveryTypeName+"."+prefKey ));

             }

             try {

                 this.recipientPreferenceService.saveRecipientPreferences(userid, userprefs, dt);

             } catch (ErrorList errorlist) {

                 error = true;

                 model.put("errorList", errorlist.getErrors()) ;

             }

             // get channelName.channels

             String[] channels = request.getParameterValues(deliveryTypeName+".channels");

             if (channels != null && channels.length > 0) {

                 for (int j=0; j < channels.length; j++) {

                     LOG.debug(deliveryTypeName+".channels["+j+"] "+channels[j]);   

                 }

             }

             //         now save the userid, channel selection

             this.recipientPreferenceService.saveRecipientDelivererConfig(userid, deliveryTypeName, channels);

         }

         // get all channels       

         Collection<String> channels = getAllChannels();

         // get existing configured deliverers

         Collection<RecipientDelivererConfig> currentDeliverers = this.recipientPreferenceService.getDeliverersForRecipient(userid);

         Map<String, Object> currentDeliverersMap = new HashMap<String, Object>();

         for (RecipientDelivererConfig udc: currentDeliverers) {

             String channelId = udc.getChannel();

             currentDeliverersMap.put(udc.getDelivererName()+"."+channelId, Boolean.TRUE);

         }

         // use for debugging, uncomment for production

         //LOG.info("CurrentDeliverersMap");

         //Iterator iter = currentDeliverersMap.keySet().iterator();

         //while (iter.hasNext()) {

         //   Object o = iter.next();           

         //   LOG.info("key: "+o.toString()+", value: "+ currentDeliverersMap.get(o) );

         //}

         model.put("channels", channels);

         model.put("deliveryTypes", deliveryTypes);

         model.put("preferences", preferences);

         model.put("currentDeliverersMap", currentDeliverersMap);

         model.put("message", "Update Successful");

         return new ModelAndView(VIEW, model);

     }

 }